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A kind of high-efficiency luminescent microsphere and its preparation method and application

A high-efficiency technology of luminescent microspheres, applied in the field of indication, high-efficiency luminescent microspheres, signs, high-efficiency luminescent microspheres in the field of lighting, can solve the problems of low luminous intensity and poor luminous effect, and achieve low raw material requirements, Increased brightness and improved luminous performance

Active Publication Date: 2018-01-02
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of luminescent materials are low luminous intensity and poor luminous effect.

Method used

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  • A kind of high-efficiency luminescent microsphere and its preparation method and application
  • A kind of high-efficiency luminescent microsphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] MgO·Al 2 o 3 0.4SiO2 2 : Light-storing phosphor powder (SP-6) of Eu component and polyvinylpyrrolidone are mixed evenly in a mass ratio of 3:1 (mass ratio can be 5:1~1:1), and then fully stirred in deionized water to make It dissolves well in the aqueous phase. The resulting dispersion was then charged into the container of the spray drying apparatus, and the inlet temperature of the spray drying apparatus was adjusted to 200°C. The carrier gas (air) used by the spray drying equipment carries the dispersion liquid for spray drying. The particle diameter of described microsphere can be by the content of the solid (storage type fluorescent powder and polyvinylpyrrolidone) contained in the regulation and control dispersion liquid, the volume of dispersion liquid and the parameter of spray drying (as the sampling speed of dispersion liquid, The inlet temperature of the spray drying instrument and the injection speed of the carrier gas (air)) are regulated. High-efficie...

Embodiment 2

[0024] The small molecular dye rhodamine 6G was dissolved in deionized water to form a solution with a mass fraction of 0.02%. Then polyacrylic acid (number average molecular weight: 3000) was added to the solution, so that the mass fraction of the obtained polyacrylic acid (number average molecular weight: 3000) was 8%. The high molecular polymer has the functions of regulating surface tension and viscosity at the same time. After fully shaking and sonicating until the polyacrylic acid was completely dissolved, the solution was used as ink for inkjet printing. Ink-jet printing was carried out with a printer on a 3 mm thick and cleaned polytetrafluoroethylene sheet with the ink prepared above. A nozzle of 10 picoliters was selected to keep the distance between the droplets at 100 microns, so that the droplets would not merge with each other after contacting the PTFE sheet, and as many droplets as possible could be prepared on the PTFE sheet. After printing, the PTFE sheet wa...

Embodiment 3

[0026] Dissolve 10 milliliters of tetrabutyl titanate in 16 milliliters of absolute ethanol to obtain mixed solution 1; add 1 milliliter of 2.35 moles per liter of concentrated nitric acid to 32 milliliters of absolute ethanol, oscillate fully to mix evenly, and obtain a mixed solution 2. Under magnetic stirring, slowly drop 15 ml of mixed solution 2 into 20 ml of mixed solution 1, and continue to stir for 8-12 hours. After the stirring is completed, a uniform and transparent sol is obtained. Add 2 grams of phosphor powder with the composition of Sr2SiO3:Dy3+ therein, and then let it stand for 24-36 hours to slowly aggregate between the colloidal particles. This process is the aging process of the colloidal particles. After standing, a gel with a three-dimensional network structure is obtained. Dry the obtained gel in an oven at 50 degrees Celsius for 8 hours to remove residual moisture and organic solvents to obtain a xerogel. The obtained dry gel is calcined at 450 degrees...

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Abstract

The invention discloses a high-efficiency luminescent microsphere and a preparation method thereof. The high-efficiency luminescent microspheres are luminescent materials with a size of 0.3-1000 microns and a spherical microscopic appearance. The invention uses a simple and easy method to spheroidize the luminescent material to obtain the luminescent microsphere, and utilizes the high scattering effect of the luminescent microsphere itself and the resonant cavity effect of the microsphere itself to improve the luminescent performance of the luminescent material. The method has no requirements on the water and oil solubility of the selected raw materials, and has no requirements on the shape and form of the raw materials themselves. And by adjusting the type of raw materials and the spheroidization process, the luminous brightness of the formed luminescent microspheres can be adjusted. The method has the advantages of low requirement for raw materials, simple and easy operation, good brightness improvement performance and the like. The prepared high-efficiency luminescent microspheres can be applied to the fields of illumination, indication and display.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to the preparation of a high-efficiency luminescent microsphere by physical and chemical methods, and the application of the high-efficiency luminescent microsphere in the fields of illumination, marking, indication and the like. Background technique [0002] With the consumption of non-renewable energy such as oil and natural gas, finding new energy substitutes has become an inevitable trend of social development, and luminescent materials have become the focus of people's attention (related patents: CN 102933686A, CN1916109A, CN 2558038Y, CN103725282A). Luminescent materials play an irreplaceable role in lighting, indication, display and other fields in modern life (China Rare Earth Information, 2010, 9, 5-8; Chinese Rare Earth, 2008, 29: 69-71.). At present, the main problems of luminescent materials are low luminous intensity and poor luminous effect. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/64C09K11/06C09K11/59
Inventor 李会增李明珠宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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